18 Sound 8MB500

8" · 16 Ω · 280 W · 95 dB · datasheet ↗

Thiele-Small parameters

Nominal size	8"
Impedance	16 Ω
Fs	73 Hz
Qts	0.5
Qes	0.58
Qms	3.44
Vas	21.3 L
Sd	230 cm²
Xmax	6 mm
Re	9.8 Ω
Bl	11 T·m
Mms	16 g
Pe	280 W
Sensitivity	95 dB

Alignment hint

EBP	126 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 21.3 L

EBP > 100: favours a ported (bass-reflex) alignment.

Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.

Substitute candidates

Driver	Fs (Hz)	Qts	Vas (L)	Xmax (mm)	Sens (dB)	Fit	Notes	Compare
18 Sound 8MB500	74 +1	0.43 -0.07	21.5 +0.2	6 =	95 =	close	8 Ω vs 16 Ω: amp load changes	+
Faital PRO 8PR150	75 +2	0.48 -0.02	16.2 -5.1	5 -1	94 -1	usable	8 Ω vs 16 Ω: amp load changes · Xmax 5 mm < 6 mm: lower excursion-limited SPL	+
Beyma 8CM V2	75 +2	0.52 +0.02	14.6 -6.7	5.7 -0.3	94 -1	usable	8 Ω vs 16 Ω: amp load changes · Xmax 5.7 mm < 6 mm: lower excursion-limited SPL	+
18 Sound 8NMB420	66 -7	0.41 -0.09	24.53 +3.23	5.8 -0.2	95 =	usable	Xmax 5.8 mm < 6 mm: lower excursion-limited SPL	+
Faital PRO 8FE300	70 -3	0.44 -0.06	15.7 -5.6	5.52 -0.48	95 =	usable	8 Ω vs 16 Ω: amp load changes · Xmax 5.52 mm < 6 mm: lower excursion-limited SPL	+
B&C 8FMB51	68 -5	0.39 -0.11	20.5 -0.8	5.5 -0.5	96 +1	usable	Xmax 5.5 mm < 6 mm: lower excursion-limited SPL	+
18 Sound 8MB500	73 =	0.36 -0.14	18.4 -2.9	6 =	95 =	usable	4 Ω vs 16 Ω: amp load changes	+
B&C 8MBX51	68 -5	0.38 -0.12	22 +0.7	6 =	97 +2	usable	200 W vs 280 W: lower power handling	+
B&C 8NDL51	70 -3	0.47 -0.03	13.4 -7.9	7 +1	94 -1	usable	200 W vs 280 W: lower power handling	+
18 Sound 8MB400	64 -9	0.38 -0.12	23.9 +2.6	5.8 -0.2	95 =	usable	8 Ω vs 16 Ω: amp load changes · Xmax 5.8 mm < 6 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 8MB500 →

Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.

Used in enclosures (0)

No enclosure in the catalog uses this driver yet.